GCSE PRODUCT DESIGN REVISION CARDS. Materials, components, processes & techniques

Transcription

1 GCSE PRODUCT DESIGN REVISION CARDS Materials, components, processes & techniques

2 Paper and card Paper: Manufacture: Plantation/de-barking/ pulp/chemicals added/poured over fine mesh/rolling & drying Paper sizes: A4, A3, A2 Weights: Units: Grams per square meter (e.g 70g/m 2 paper) Thickness: Microns (Thousandth of a mm) Paper & Board -Layout & tracing paper -Use: designing -Cartridge paper -Use: general drawing -Carton/duplex board -Use: food packaging -Solid white board -Use: high quality packaging -Foil-lined board -Reflect heat -Use: takeaway containers -Corrugated board -Use: packaging for transportation -Foam core -Use: Architectural models

3 Timber based materials Hardwoods -Slow growing/ deciduous/ tighter grain/ denser Slab sawn Quarter sawn Softwoods: Scots Pine: Use: Construction Parana pine Use: Furniture Hardwoods: Beech Use: Furniture/toys/tool handles Oak Use: High quality furniture Ash Use: Tool handles Mahogany Use: Good quality furniture Teak Use: Outdoor furniture Softwoods -Fast growing/ needles/ cones/ evergreen Grain/Knot Manufactured board MDF (Medium Density Fibreboard) -Use: Interior panelling / low cost furniture Hardboard (Similar to MDF) -Use: Furniture/ picture frame backs Chip board -Use: Laminated table tops/ low cost furniture/ flooring Plywood (Layered veneers at 90 degrees) -Use: General construction Blockboard (Strips of wood sandwiched Between two veneers) -Use: Furniture (where strength Is needed) Forestry Stewardship Council (FSC) -Sustainable forests

4 Ferrous metals -Ferrous metals: -Mined from the ground (ore) -Consist of iron -Prone to rusting Examples -Cast iron -Use: Metalwork vices, drain covers -High speed steel -Use: Drill bits, lathe tools, cutters -Stainless steel (Alloy) -Use: Kitchen sinks, cutlery, surgical instruments Stock forms: Sheet -Mild steel -Use: Nuts, bolts, car bodies -Tool steel -Use: Hand tools, garden tools, springs Rod/bar Tube Ingot

5 Non Ferrous metals Non-Ferrous metals: -Don t contain iron -Not magnetic -Don t rust Aluminium Use: Cooking foil, saucepans Copper Use: Plumbing pipes, electrical wire Tin Use: coating on food cans Zinc Use: Coating on buckets, screws, roofing sheets. Silver Use: Jewellery Alloys: -Two or more elements -Improved properties Brass Use: Door handles, plumbing fittings Pewter: Use: Jewellery, picture frames, decorative ornaments Stainless steel: Use: Sink/cutlery

6 Polymers Source -Crude oil (synthetic) -Non-renewable -Not sustainable Thermoplastics (Soften when heated) Polyethylene Terephthalate Use: Drinks bottles High density polyethylene Use: Detergent bottles Polyvinyl chloride Use: Wire insulation Low density polyethylene Use: Plastic bags Polypropylene Use: Folders Polystyrene HIPs (High Impact) Use: Packaging inserts Expanded Polystyrene Use: Packaging inserts e.g. ABS - Acrylonitrile Butadiene Styrene Use: Hard hat Thermosetting plastics (Cannot be re-heated) Urea formaldehyde (UF) Use: Electrical sockets Melamine formaldehyde (MF) Use: Worktop laminates Epoxy Resin Use: Printed Circuit Boards (PCB s), Araldite glue -Thermosetting plastics cannot be recycled

7 Smart materials -Shape Memory Alloy (SMA) -Nitonol (Nickel-Titanium alloy) -Heat/movement -Use: flexible spectacles (super-elastic wire), stent, muscle wires Stent -Polymorph: -Low melting point thermoplastic -Melts in hot water -Use: Modelling prototypes i.e. for hand grips. Photochromic materials -Change colour with changes in light -Use: Reacta-light glasses Thermochromic Materials -Change colour in response to heat. -Use: forehead thermometer Quantum tunnelling composite (QTC) -Changes from an insulator to a conductor when squeezed -Use: Scales, Smart textiles with touch sensitive fabrics

8 New materials / Composites Corn starch polymers -Made from corn or potato starch -Biodegradable -Renewable / sustainable -Safer for food packaging -use: biodegradable packaging materials, medication capsules, dissolvable stitches. -Precious metal clays -Contains particles of metal -Easy to work by hand -Heated to fuse together -Use: jewellery Composites: Fibre Reinforced Polymers Glass reinforced plastic (GRP) -Glass fibres with resin -Laid up in a mould Use: boat building Carbon Fibre reinforced plastic (CFRP) -Woven carbon fibre sheets combined / laid up with resin. Use: racing bike, sports cars. Kevlar -High strength synthetic fibres -Woven into fabric sheets Use: body armour Fibre reinforced concrete

9 Manufacturing Scale of production One-offs -Time consuming -Expensive i.e. sculptures, wedding dress Batch -Series of identical products i.e. furniture, bread Mass -Large numbers -Production line -High set-up costs i.e. cars, electrical goods Continuous -24hr production lines i.e. soft drinks, oil, electricity Just in time -Well timed delivery of stock -Less warehouse space needed -Computer stock management Computer Aided Design (CAD) -Accuracy/ Ease of editing -Ease of communication (i.e. ) Computer Aided Manufacture (CAM) -Repeat manufacture -Identical components -Accuracy -Low labour costs Computer Numerical Control (CNC) -Machinery controlled by computer data -Data transfer

10 Plastic processes Injection moulding -Complex 3D shapes -High volumes -Use: Product casings i.e. TV remote Blow moulding -Hollow objects Use: drinks bottles Vacuum forming Use: packaging Rotational Moulding Use -Enclosed objects -Large objects i.e. ball Line bender/strip heater -Bending Acrylic -Use: leaflet holder Extrusion Use: Tubes Compression moulding -Thermosetting polymers Use: Electrical sockets

11 Metal processes Sand casting (Cast iron, aluminium, brass etc.) Use: Large components i.e. train wheels -Lower quality finish -Mould not re-usable -Used in schools Die casting -Similar to injection moulding -Low melting point alloys Use: Engine parts Lost pattern casting (Investment casting) -Sophisticated process Use: Complex shapes i.e. Jewellery Die casting in schools -Pewter casting (Low melting point) -MDF moulds (CNC cut) Use: Jewellery, pendant, key tag Turning, Milling, Drilling etc.

12 Finishing processes Finishes on materials -Protect from deterioration -i.e. rusting, oxidation, rot etc. -Improve appearance Paints Oil-based Water based Solvent based Varnishes and lacquers -Clear coat Oils and polishes -Garden furniture Wood stains -Enhance the colour of timber Enamelling -Powdered glass coating -Baked on in oven -Use: jewellery Plastic dip coating -Polymer layer Use: tool handles Electroplating -Layer applied through electrolysis -Chrome layer Use: Taps, bathroom rails Galvanising -Steel dipped into molten zinc -Protect from rusting -Exterior use Use: Railings Polishing -Buffing to remove oxide Use: Taps, bathroom rails

13 Fixing components Bolt Tap Machine screw Die Round head screw Tap wrench Countersunk machine screw Studding Threaded rod Nut Rivet Die stock Thread sizes Clearance hole Pilot hole M3, M4, M6 etc. Pop-rivet Tapping size

14 Electronics & circuit manufacture Circuit design (Computer Aided Design - CAD) Soldering Soldering Iron and stand Circuit Wizard Schematic circuit diagram Solder (Flux) Circuit drawing PCB Milling (Computer Aided Manufacture - CAM) Eye protection / Ventilation? Tinning the connections? Advantages -Circuit simulation -On screen testing -Accuracy -Ability to edit circuit -Batch/mass production -Identical copies PCB Etching Copper wire (Good conductor of electricity)

15 Electronic components Cell Battery Capacitor Resistor Variable resistor Light Dependent Resistor (LDR) Light Emitting Diode (LED) Diode Buzzer Switch Transistor Thyristor Motor 555 Timer

16 Printing Process colours Used in commercial printing Colour registration marks Alignment of process colours Cutting die Cutting, creasing, perforating Use: packaging Screen printing Use: Fabric i.e. T shirts Flexography Use: Printing plastic bags Embossing Use: Greetings cards Block printing -Simple process -Similar to potato printing Use: Printing decorative fabrics Offset Lithography -Oil(ink) & water don t mix Use: Commercial printing on paper & card Dye sublimation -Heat transfer Use: T Shirts

17 Packaging and labelling Packaging -Protect: during transit -Inform: i.e. contents/ingredients -Display: in store -Transport: ease of stacking or moving -Contain: keep together -Preserve: against bacteria, weather Symbols -International standards/codes -Pictograms to inform the user Packaging symbols Manufacturing packaging -Cutting die -Surface development (net) -Creasing, perforating

18 Hand tools Common hand tools Clamping tools G Clamp Combination pliers Pointed nosed pliers Machine vice Hand vice Hacksaw Side cutters Bench vice Junior hacksaw Marking out tools Scriber Engineers try square Coping saw Needle files Centre punch Engineers blue Hand file Ball-pein hammer Micrometer Vernier caliper

19 Common machine tools Manual machinery Centre lathe Milling machine CAD: Computer Aided Design Strip heater Power hacksaw Vacuum former CAM: Computer Aided Manufacture CNC Router Vinyl cutter Profile cutter Linisher Disc sander Laser cutter 3D Printer Pillar drill CNC Lathe (Computer Numerical Control)

20 Health & Safety PPE Personal Protective Equipment -Eye protection (goggles/visor/safety glasses) -Appropriate footwear -Dust mask -Gloves -Guards Risk assessment Risk assessment -Identifying the hazards -Calculating the risk/probability -Control measures in place Hazards -Trapping clothing/limbs -Dust inhalation -Swarf being thrown during cutting -Workpiece coming loose

21 Drawing conventions Scale: 2:1 (double size) 1:1 (actual size) 1:2 (Half scale) Tolerance: i.e. 12mm +/- 0.2mm Horizontal dimension Computer Aided Design (CAM) -2D Designer -3D Solidworks British standard conventions 3 rd Angle Orthographic projection Centre line Vertical dimension Cross section Angular measurements Hidden detail Radius dimension Diameter measurement r13 3 rd Angle Orthographic projection

22 Human factors User safety British Standards (Kitemark) Age restriction (Unsuitable products) European standards Anthropometric data -Human body measurements -5 th /50 th /95 th percentile -One size fits all 5 th to 95 th percentile -Smaller (5 th percentile) -Bigger (95 th percentile) British toy and hobby association -Manufacturer membership -High standards / safety ensured Ergonomics -Designing products with usability In mind (e.g. size, shape, texture, colour, layout) -Ease of use / comfort etc. -Using anthropometric data

23 Social, moral & Environmental Product labelling Environmental Hazard (i.e. oil) European standards Made from recyclable materials Toxic substances Identifying plastics British Standards (Kitemark) Forestry Stewardship Council (FSC) -Sustainable forests Corrosive Liquids (i.e. bleach) Irritant (i.e. cleaning products) Highly Flammable (petrol) Recyclable aluminium Reduce -The amount of material used Re-use -Instead of throwing away Refuse -To accept unethical or wasteful designs Re-think -Our attitude to environmental impact Carbon Footprint -Production of carbon dioxide -(units of CO2) -Transportation Product miles -Source factory retailer end user Product Life Cycle Recycle -The materials already used -Safe disposal Repair -Products that have broken

24 End of topic assessments Topics Complete Topics Complete Metals Plastics Printing processes Design styles Plastics 2 Design styles 2 Woods Smart & Modern materials Plastic processes Plastic properties & processes Tools & Equipment Considering the needs of the user Environmental issues Inspiration from nature Packaging manufacture